Except that generations differ from each other in both behaviour and values. Moreover cultures differ from each other in both behavior and values.
When you make a test on American 18-20 years old, you may be learning something universal about humans or you may be learning something special about products of current American educational system. Perception and social behavior of current American 18-20 may seem universal to someone who is American 18-20 or close to them, but not necessary when you come from different culture.
Many of those studies try to measure how much you are influenced by something you read/heard ten minutes ago, how much likely you are to cooperate/compete in some special situation etc. Are you claiming that these reactions are necessary universal?
When you make a test on American 18-20 years old, you may be learning something universal about humans or you may be learning something special about products of current American educational system. Perception and social behavior of current American 18-20 may seem universal to someone who is American 18-20 or close to them, but not necessary when you come from different culture.
Many of those studies try to measure how much you are influenced by something you read/heard ten minutes ago, how much likely you are to cooperate/compete in some special situation etc. Are you claiming that these reactions are necessary universal?